Sunglass lens misting up?

One sunglass lens misting up when surf skiing and the other one fine? Stick your finger onto the one that is fine. If you poke your finger in your eye, then the lens is missing - found out this trick yesterday.

You made my day sunnier...thanks.

Laughed out loud with that one Pop, thanks...

I recommend www.defogitworks.com/ for the side that still has the lens.